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Author SHA1 Message Date
Tobias Grosser 1c18440958 [BlockGenerator] Invalidate SCEV values for instructions in scop 
We already invalidated a couple of critical values earlier on, but we now
invalidate all instructions contained in a scop after the scop has been code
generated. This is necessary as later scops may otherwise obtain SCEV
expressions that reference values in the earlier scop that before dominated
the later scop, but which had been moved into the conditional branch and
consequently do not dominate the later scop any more. If these very values are
then used during code generation of the later scop, we generate used that are
dominated by the values they use.

This fixes: http://llvm.org/PR28984

llvm-svn: 279047
 2016-08-18 10:45:57 +00:00
Tobias Grosser 13e55a32fd [test] Force invariant load hoisting one last time 
Without invariant load hoisting an (unrelated) bug is exposed in this test
case: http://llvm.org/PR28984

llvm-svn: 278680
 2016-08-15 16:43:33 +00:00
Johannes Doerfert a61eda7698 [FIX] Let ScalarEvolution forget hoisted values 
We have to rethink the handling of escaping values in order to make
  this kind of "fixes" go away.

llvm-svn: 270409
 2016-05-23 09:02:54 +00:00